You can check in yourself online for your flight with Internet check-in. You reserve your seat yourself, print your own boarding card and thereby bypass the often lengthy queues at the airport.
Depending on the airline and destination, you can check in approx. 30 hours to approx. 1 hour prior to departure. For further information, we would refer you to the websites below of the airlines concerned.
Air Canada (only for departure from Canada and the USA)
Delta Airlines (only within the USA)
EVA Air (only from Taipei and Khaohsiung)
JAL Japan Airlines
LOT Polish Airlines
United Airlines (only from the USA)
US Airways (only within the USA)